Checkering machine



March 7, 1933. R. J. SElLER 1,900,203

I CHECKERING MACHINE Filed April 3, 1931 48heets-Sheet 1 I N V EN TOR.

EYS.

March 7, 1933. R. J. SEILER 1,900,203

CHECKERING MACHINE- Filed April 3, 1931 4 Sheets-Sheet 2 TTORNEYS.

R. J. SEILER CHECKERING MACHINE March-7, 1933.

Filed April 3, 1.931 4 Sheets-Sheet 3 IN VEN TOIIL Rak/mrdJ-Jeiler March 7, 1933. R. .1. SEILER 1,900,203

CHECKERING MACHINE Filed April 5, 19:51 4 Sheets-Sheet 4 INVENTOR. Ric/lard clJ i A TTORN E YS.

Patented Mar. 7, 1933 ED sfmrss ATE OFFICE RICHARD J. SEILER, OF ILION, NEW yoaxhssrenon T REMINGTON ARMs COMPANY,

INC A CORPORATION or DELAWARE CHECKERING MACHINE Application filed April- 3,

This invention relates to machines for out-- 'i ting or impressing ansornamental design upon a surface. The particular embodiment thereof whichhas been selected for the purpose of illustration is a machine. for forming upon the curving surfaces of such articles of ,Wood. as the fore-endsof shoulder guns an ornamentation consistingiof a pluralityof. series as checkering. In the past all such checker ing has been done by the use of a few typesof "of intersectingparallel grooves. Such ornamentatio is commonly referred tour this art manual :tools in the hands of skillful operators. The present invention contemplates .a semi-automatic machine for this purpose,

said machine consisting essentially of Work- "holding, rotating and traversing devices,

' equipped with suitable indexmechanism and suitably presenting the work to a grooving tool; together With novel'supporting, actuat ing and controlling devices for such tool.

In the dra'wings:

- Fig. 2 is an end elevation thereof.

F ig. 3 is a section substantially on the line 8-3 of :Fig. 1. Fig. 4 is a development of the pattern controlling sleeve.

Figure 5 is a development of a section of the.

. Work rotation controlling sleeve.

- Fig. 6 is a section substantially on the line 6-6 of Fig. 1.

substantially on the line 88,of Fig. 2. r

- Fig. '4' is a-Jplan of thebaseplate, illus: .trating the shifting of the Work-holding mechanism-to different angular positionsrelativ'e to the cutter. Fig. 8 is an enlarged sectional. elevation of.

the cutter supporting and controlling device Fig; 9:is a perspective of a'fire-arm fore-end checkered upon the maehlne of the present 1n-;

vention.

- Fig. 10 is a fragmentary development ofthe surface of a fore end checkered in a pattern differing slightly from that shown in Fig. 9. I

Y The Working parts ofthema'chineare sup ported 'upon'a frame comprising ajbase plate 10, an uprightpost 11, and an arm 12 extend- 1 ing-horizontally from the aupper part of, said Fig. 1 is aside elevation ofthe-novelina j chine.

1931. ScrialNo. 527,461.

.post'and preferably adjustably secured there in by suitable means, such as set screws13.

v The post 11 is provided with a, bracket 14 adapted to support a motor 15. The Work holding and moving mechanism is mounted, .on a bed plate 16, whichis pivoted at '17 to the framebase 10, and adapted to move relative to the base 10 about thepivot 17 between thelimiting positions indicated in Fig. 7.

The end of the base 10 is suitably widened as.

shown in Fig. 7 to provide the proper. sup:

port for the'mechanism supporting bed; plate 16 inall. positions, and suitable means, such as apertures 101 adapted to receive a retract- 'ible pin or stud associated with'plate; 16, are;

provided for holdingsaid plate inanydesired position with respect to the frame base .10. I l

Formed in the bed plate 16 is a longitudinal dovetail channel or guide-way adapted to receive a supporting base 18, movable longitudinally in. said guide-Way," Secured to the base18 are posts 19 and 20 provided at their upper ends with.bearingapertures or journals '21 and 22. Said journals receive an arbor 23 passing through the journals and extending beyond the post 20 for the pura1'bor23, of 'suchsize and shape as to sup-' port-such a foreend piece so that its exterior surface is substantiallyconcentric with 1 said arbor. The work is slid over the end of sald. sleeve and is secured .by sultable means.

such asa nut 25, threadeduponthe end. of

' sleeve 24.

Between the posts19and- 20,-the arbor 23 carries work rotation and traverse. controlling devices. The work supporting sleeve 24; may be permanently fixed to arbor 23 but, for reasons which Will be hereinafter discussed, the sleeve 24 is preferably adjustably secured to the arbor23 by suitable means, one form of which is illustrated in Fig. 6. In-

porting sleeve 24. By retracting the plunger 28 to disengage the same from the teeth the supporting sleeve 24 may be adjusted relative to the arbor 23 and when the desired adjustment is made, the plunger 28 is permitted to engage between the proper teeth 30, after which the sleeve 24 rotates with the arbor 23.

A cutting wheel 32 (Fig. 8), supported,

rotated and controlled in a manner to be hereinafter described, is located above the sleeve 24 in a position to operate upon the piece of work secured upon said sleeve. Said wheel is substantially in a plane of the longitudinal axis of the base 10; thus, when the work and controlling mechanism is rotated upon the base 10, the work will be brought into an oblique position with respect to said'wheel and thereby adapted to receive from said wheel the diagonally extending grooves illustrated in Figs. 9 and 10. The longitudinal position of the wheel is fixed and the work is simultaneously traversed and rotated beneath said wheel. For the purpose of traversing the work, the base 18 is provided with a suitable hand lever 33 pivoted at 34 on a bracket 161 secured to bed plate 16. As the work is traversed by the movement of hand lever 33, it is rotated through a device which is preferably constructed as follows: Upon the arbor 23 is supported a rotation controlling sleeve 35 provided with cam slots or grooves 36 and 361. For the purpose of producing the pattern of diagonal checkering illustrated in Figs. 9 and 10, said grooves are reverse spirals of uniform pitch, a development of which is illustrated in Fig. 5. The pitch of each spiral groove is determined with reference to the angle of the work to the plane of the cutting wheel, so that the resultant of the rotational and translational movements of any point upon the work is substantially a straight line in the plane of the cutting wheel. The two grooves correspond respectively to the two angular positions of the mechanism upon the base 10.

Each of the grooves 36 and 361 is adapted, when presented upon the upper part of sleeve 35, to receive the end of a plunger 37 mounted in a bracket 38 rigidly secured to the fixed bed plate 16 and urged inwardly by a spring 39. It is thus apparent that as the base 18 is advanced by the movement of the hand lever 33, or other suitable means, the arbor 23 with the work on sleeve 24 will be rotated by reason of the engagement of the stationary plunger 37 in the groove 36 of sleeve 35, which sleeve is fixed to the arbor 23.

For the purpose of limiting the forward and reverse movement of the mechanism in such manner as to determine, for example, the pattern of checkering illustrated in Fig. 10, a pattern controlling sleeve 40 is loosely mounted upon the rotation controlling sleeve 35. Said sleeve 40 comprises an aperture, developed in Fig. 4, the margins of which serve as limiting stops for the plunger 37. When the plunger engages any of said stops both translation and rotation of the arbor and associated parts are arrested. The configuration of the stop surfaces in Fig. 4 is such as to produce the pattern developed in Fig. 10. The outline of the pattern is obviously determined by the intersection of groove 36 with the margins of the aperture in pattern sleeve 40. The pattern sleeve is fixed to the arbor 23 in order to move at all times with the work on sleeve 24.

To index the rotation sleeve 35 relative to the pattern sleeve 40, the following mechanism is provided: An arm 43, fixed to a projecting end of the rotation sleeve, has pivoted thereto at 44 an escapement pawl carrier 45. The escapement pawls on said member 45 co-operate. with peripheral and crown teeth 46 and 461 on a disk 47 secured to the pattern sleeve 40 by suitable means such as that illustrated in Figs. 1 and 3. A coiled flat spring 48 has one end connected with the rotation sleeve 35 and its opposite end secured to the disk 47 which disk, with the pattern sleeve 40, thus tends to rotate with respect to the rotation controlling sleeve 35. The move.- ment of sleeve 40 with respect to sleeve 35 is controlled by pawls on the pawl carrier 45. One of these pawls 49 engages the peripheral teeth 46 of disk 47, while the second pawl 50 engages between the crown teeth 461, said teeth being cut for this purpose in the manner illustrated in Fig. 2. Fawl 50 may be integral with the carrier 45, while pawl 49 is preferably carried by a plunger 51 provided with a finger piece 52 and urged inwardly by a spring 53, whereby disk 47 can be freed from both pawls by retracting said plunger. Spring 53 likewise serves to normally retain pawl carrier 45 in position to engage pawl 49. Indexing is normally effected by rocking the pawl carrier 45 about its pivot 44 to engage the pawl 50 and disengage pawl 49; the pawl carrier is then permitted to assume its normal position shown in Fig. 1., the disk 47 having in this movement escaped one tooth with respect to pawl 49.

The cutting wheel 32 is carried on a shaft or arbor 55 journalled in a yoke frame 56 in a suitable guide-way in a, guide block 59 13 ltion .to .a' .treadle Qby thedepression. ofwhich I cutting: wheel,lis, .urged downwardly ,by a

.q-suitableimeans such v as spring .60 engaging with the end'of the bar 58 and a suitable. .ab.utment in aguide block, 59. Connected to.

.. the,ba'r.5.8. is. a lifting. link. (illlaviing a pivotal g connection with a lever 62 pivoted in a brackwet; .621--..and;- adapted for manual operation ."by any suitable .means such as ,alink connecii'the cuttingwwheelis lowered upon the work. wflheldepthof thecut made. by the wheel is lllimited and-fregulatedby arpressure foot 63 Y i-whicli straddles .the. Wheel and is provided i --Wltl1; a shank by which it is adjustably secured to. the bar',58}.

:e-Means are provided, forinterrupting the .cutting ac tionnof. the wheel 32,. while the i compound movement of .the work continues,

.for the purpose of producingsuch uncut surfaces Within the pattern as illustrated in -Fig. 10. It issobvious that if the cutting wheel is merely lifted outof contact, with the work i 1 .du ring.1a certain movement of the w.ork,an

Zunc ut pattern-of anydesired configuration.

may be produced. :F or .this purpose, agear wheel 64. is fixed to thepattern sleeve 40 and. meshes with. a. gear .wheel 65 secured to a shaft. 66supported from the base 18 in suitf; -gated.cam- .67 ,the effective portion of which has a configuration correspondingto the pattern desired. said cam 67. controls a cam. follower. 68' suitably. supported. from the frame post .11 lTheupper end of'said cam.

- -follower is provided witha stud 69 which underlies a short arm 7 extending from the cutting wheel supporting frame or yoke 56.,

-Obviously when the high part of cam 67 enbe liftedout of engagement with the work and will remainout of engagement until,

inthe rotation of pattern sleeve so. and the accompanying rotationand the advance of the work, the cam.,follower passes ofi. from the high part of the cam. The length of the uncut figure in the pattern is determined by the length of cam 67, it being remembered.

that said cam advances with the work while 0 the cam follower is'on the stationary frame.

. The operation of themachine is as follows: A piece of work,.such as a fore-end,

is placed' upon the sleeve 24in the proper --.position with respect to the pattern determiningopening insleeve 40. The rotation sleeve, is thereupon rotated into such a position with respect to the pattern sleeve that the cutting wheel 32 will be properlypositioned 5 Q72 on Fig. 10. For the. making of this cut and those parallel therewith, the bed plate 16 and parts carriedther'ebyare moved. to the,

right hand side of the base 10. Only a short able brackets. Said shaft carries an elongages cam follower 68 the cutting wheel will.

to beginthe first of the diagonally extending. I

cuts or grooves which form the pattern, as for example the groove indicated by the numeral.

section of the cam groove 36 cjorresponding to thelength of the cut 72is exposed through the pattern opening. The plunger being r pushed in the groove 36, the lever 33is drawn backward until said plunger engages the side wall of the pattern opening. The cutting wheel 32 being rotated through its connec- .tion with the driving motor,said wheel low- 3.7 with the diagonally extending end wall of the pattern opening. The cutting Wheel 32 is thereupon lifted out of contact with the work, the work is indexed one step to the left by manipulation of thepawl carrier 45, and the lever 33 is again drawn backward until, stopped by the engagement of plunger37 with, the sidewall of the pattern; opening. The cutting wheel 32is now again lowered and the lever 33 pushed forward in order to make a second diagonalcut parallel with.

the first. This operation is repeateduntil all of the cuts parallel with the cut 72 have been made. When the cutting tool reaches the vmargin of the uncutfigure 73 within therpattern, said wheel is automatically lifted out;

of cutting engagement with the work by the action of cam 67 upon its cam follower 68, and

remains out of engagement for each of the successive interrupted cuts until the rotation of the pattern sleeve carries the high part of.

the cam from beneath-the cam follower. The number of cuts which are thus interrupted, as well as thelength of the 'breakin each cut, is determined by-the Configuration of cam 67. When all of the.cuts jwhich arei parallel to the cut 72 have been'made, the work supporting and controlling mechanism is swung to theleftto' positionthe work for receivingthe second set of diagonal cuts, and

rotation sleeve 35 is rotated to engage plunger- 37 in opposite spiral groove, and the operatlon above described is repeated. 'Since'the cutting tool is a circular wheel, the several grooves will not terminate sharply; hence, it

is, desirable to finish the pattern by extra mar-- ginal cuts which lie outside of the pattern as determined by the pattern sleeve. It is for this purpose that the loose connection between the arbor 23 and the work supporting sleeve 24 isprovided. i I f Therotation sleeve may be indexed any desired number of spaces relative to the pattern sleeve. for making such-finishing marginal cuts as illustrated in Fig. 10. l

The embodiment of the invention herein described and shown in-the drawings is to be understood as illustrative only, the inventionbeing susceptible to embodiment in many.

other forms, all fallingwithin the scope of the appende d, claims, which claims are to be broadly construed.

What is claimed is: v 1. In a machine of the character described,

a fixed cutting tool support, a cutting tool carried by said support, a Work supporting arbor adapted to hold a piece of work in cooperative relation to said cutting tool, work' controlling sleeve.

2. In a machine of the character described, a fixed cutting tool support, a cutting tool carried by said support, a work supporting arbor adapted to hold a piece of work in cooperative relation to said cutting tool, Work rotating and traversing means comprising a rotation controlling sleeve associated with said arbor, work rotation and traverse limiting means comprising a pattern controlling sleeve associated with said rotation controlling sleeve, and means for indexing said rotation controlling sleeve relative to said pattern controlling sleeve.

3. In a machine of the character described, a fixed cutting tool support, a cutting tool carried by said support, a work supporting arbor adapted to hold a piece of work in cooperative relation to said cutting tool, work rotating and traversing means comprising a rotation controlling sleeve associated with said arbor, work rotation and traverse limiting means comprising a pattern controlling sleeve associated with said rotation controlling'sl'eeve, and means for indexing said work 'relative'to said rotation controlling sleeve.

l. In a machine of the character described, a fixed cutting tool support, a cutting tool carried by said support, a work supporting arbor adapted to hold a piece of work in cooperative relation to said cutting tool, work rotating and traversing means comprising a rotation controlling sleeve associated with said arbor, work rotation and traverse limiting means comprising a pattern controlling sleeve associated with said rotation controlling sleeve, means for indexing said rotation controlling sleeve relative to said pattern controlling sleeve, and means for indexing said work relative to said rotation controlling sleeve.

5. In a machine of the character described,

a fixed cutting tool support, a cutting tool carried by said support, a work supporting arbor adapted to hold a piece of work in cooperative relation to said'cutting tool, work rotating and traversing means comprising a rotation controlling sleeve associated with said arbor, work rotation and traverse limiting means comprising a pattern controlling sleeve associated with said rotation controlling sleeve, means for indexing said rotation controlling sleeve relative to said pattern controlling sleeve comprising a spring connection between said sleeves, a toothed disk associatedwith one of said sleeves, and an escapement pawl associated with the other sleeive and adapted for cooperation with said dis I. i

6. In a machine of the character described, a fixed cutting tool support, a cuttingtool carried by said support, a worksupporting arbor adapted to hold a piece of work in cooperative relation to said cutting tool, means for moving said work with respect to said tool to cause the cutting of a pattern on said work comprising a work rotation and traverse controlling member associated with said work supporting arbor, and means for limiting and defining the pattern cut by said tool on said work by stopping the relative movement of said work and said tool, said means comprising a pattern controlling member associated with said rotation and traverse controlling member and normally moving therewith.

7. In a machine of the character described, a fixed cutting tool support, a cutting tool carried by said support, a work supporting arbor adapted to hold a piece of work in cooperative relation with and oblique to the plane of said cutting tool, means for moving said work with respect to said tool to cause the cutting of a pattern of two series of diagonally extending and relatively angularly disposed grooves on said work comprising a rotation controlling sleeve provided with two spiral guide surfaces of opposite pitch, the pitch of each of said guide surfaces being determined with reference to the inclination of said diagonally extending grooves, and means for reversing the angle of said Work to said cutting tool to correspond to the one of said spiral guide surfaces which is efiective.

8. In a machine of the character described, a fixed cutting tool support, a cutting tool carried by said support, a work supporting arbor adapted to hold a piece of work in cooperative relation to said cutting tool, means for moving said work with respect to said tool to cause the cutting of a pattern on said work comprising a work rotation controlling sleeve, a pattern controlling sleeve surrounding said worx rotation controlling sleeve, a guide groove in said rotation controlling sleeve, a fixed member engaging in said guide groove and adapted to limit the movement of the work relative to the cutting tool by engagement with said'pattern controlling sleeve.

9. In a machine of the character described, a fixed cutting tool support, a cuttingtool carried by said support, a worksupporting arbor adapted to hold a piece of work in cooperative relation to said cutting tool, means for moving said work with respect to vsaid tool to cause the cutting of a pattern on said work comprising a work rotation controlling sleeve, a pattern controlling sleeve surrounding said Work rotation controlling sleeve, a guide groove in said rotation (controlling sleeve, a fixed member engaging in said guide groove and adapted to limit the movement of the work relative to the cutting tool by engagement with said pattern controlling sleeve, means for interrupting the pattern comprising a device adapted to lift'the tool out of engagement with the work, and operating mechanism for said device associated with said pattern controlling sleeve.

10. In a machine of the character described a cutting tool, a work supporting arbor adapted to hold a piece of work in cooperative rela tion to said cutting tool, means for causing said tool to cut a pattern on said work comprising a work rotation and traverse control.- ling sleeve provided with a guide groove, a pattern controlling sleeve surrounding said rotation controlling sleeve and provided with an aperture of a configuration corresponding with the configuration of the desired pattern, a fixed control ing member extending througl the aperture in said pattern controlling sleeve and entering the groove in said rotation con trolling sleeve and adapted to limit both the rotation and the traverse of the work by engagement of the margins of the aperture in said pattern controlling sleeve.

11. In a machine of the character described,

a cutting tool, a work supporting arbor adapted to hold a piece of work in cooperative rela tion to said cutting tool, means for causing said tool to cut a pattern on said work comprf sleeve associated with said arbor and comprising a. guide groove, apattern controlling sleeve surrounding said rotation controlling sleeve and comprising an aperture of a configuration corresponding to the desired pattern, movement limiting means comprising an element extendin through. the aperture in the pattern controlling sleeveand entering the guide groove in the rotation control ing sleeve, I

means normally effective to couple the rota tioncontrolling sleeve and the pattern controlling sleeve together, and means for indexing said rotation controlling sleeve relative to said pattern controlling sleeve.

12. In a machine of the character de scribed, a fixed cutting tool support, a cutting tool carried by said support, a work supporting arbor adapted to hold piece of work in cooperative relation to said cutting tool, means for moving said work with respect to said tool to cause the cutting of a pattern on said work comprising a work rotation controlling sleeve, a pattern controlling sleeve surrounding said work rotation controlling sleeve, means for interrupting the pattern comprising a tool lifting cam, and means for moving said cam in synchronism with said pattern controlling sleeve.

13. In a machine of the character described, a fixed cutting tool support, a cutmg a rotation and traverse controlling ting tool carried by said support, a work supporting arbor adapted to hold a piece of work in cooperative relation to said cutting tool, means for moving said work with respect to said tool to cause the cutting of a pattern on said work comprising a work rotation controlling sleeve, a pattern controlling sleeve surrounding said Work rotation controlling sleeve, means for interrupting the pattern comprising a tool lifting cam,

and means for moving said cam in synchronism with said rotation and pattern controlling sleeves.

14:. In a machine of the character described, a fixed cutting tool support, a cutting tool carried by said support, a work supporting arbor adapted to hold a piece of Work in cooperativerelation to said'cutting tool, means for moving said work with respect to said tool to cause the cutting of a pattern of two series of diagonally extend-v ing and relatively angularly disposed grooves on said work comprising a rotation controlling sleeve provided with twospiral guide surfaces of opposite pitch,'the pitch of each of said guide surfaces being determined with reference to the inclination of said diagonally extending grooves, and a member carried on a stationary part of the machine frame adapted to engage one of said spiral guide surfaces and movable to permit shifting of said rotation controlling sleeve to bring eitlipr of said surfaces into engagement therewit I 15. In a machine of the character described, a cutting tool, a work supporting arbor adapted to hold a piece of work in cooperative relation to said cutting tool, means for causing said tool to cut a pattern on said work comprising a work rotation and traverse controlling sleeve provided with a guide groove, a pattern controlling sleeve surrounding said rotation controlling sleeve 

